MacPyOML Users (before 1.7.2): This functionality is only available in the PyMOLX11Hybrid version of MacPyMOL. Please rename the downloaded “MacPyMOL.app” to “PyMOLX11Hybrid.app” to enable this functionality.

Pre-integrated volume rendering is the new default in Incentive PyMOL 1.7.2. It reduces layering artefacts significantly which are often seen on steep color gradients and/or a low number of volume_layers. It comes at a slightly higher computation cost.

The named color ramp will also show up in the “Action > volume > ...” menu of map objects, and in the “Color > ...” menu of volume objects.

Adjusting volume colors is easiest done with the interactive volume panel (”Color > panel” in the menu of volume objects). After fine-tuning, you can get the color ramp script with the volume_color command, for re-use like in the example above: